I just started wearing the EVS flux and I like it. The way it flexes to fit your body is cool. I had a 661 that I couldn't wear, it dug into my shoulders like crazy. I had 2 fox ones that wear comfortable but the way the strap mounted to the chest protector was ridiculously flimsy and they both broke in under a year in the exact same spot. The EVS is built 10x better.